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All Journal JCER (Journal of Chemistry Education Research) UNESA Journal of Chemical Education
Tri Wahyuni
SMK Negeri 1 Cerme Gresik
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Other

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IMPLEMENTATION OF CROSSWORD PUZZLE MEDIA IN LEARNING CHEMICAL WITH NUMBERED HEADS TOGETHER MODEL (NHT) Tri Wahyuni
JCER (Journal of Chemistry Education Research) Vol. 2 No. 1 (2018): Volume 2 No. 1 June 2018
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jcer.v2n1.p11-18

Abstract

This classroom action research aims to improve learning on the competence of the technique of electrical installationstudents SMK class X on the topic of chemistry through the learning Numbered Heads Together (NHT)model using crossword puzzles. The findingsstudy are the results cycle I pre-test 60 and post-test 65 while in  cycle II pre-test of 70 and post-test 94. Performance teachers in cycle 1 is 59% moderate category and cycle II is 100% high category. Behavior change students in cycle I is 50% categorized as low student activity and cycle II 80% is categorized high student behavior change. The activity of the student spirit learning cycle I 53% is categorized enough and cycle II 85% is categorized as high. The results of the interview cycle I and II there are changes that the better because students feel very happy and enthusiasm with media crossword puzzles. Based on the Minimum Exhaustiveness Criterion (KKM) review, the application crossword media on elemental chemistry learning with NHT type learning model influences students learning outcomes in the complete category. Based on these results, it was concluded that. The application crossword media with learning model NHT can increase learning interest and learning achievement of class X TITL-1 students at SMKN 1 Cerme Gresik year 2017-2018. 
IMPLEMENTATION OF PROJECT-BASED LEARNING WITH AN EDU-ECOPRENEURSHIP FOCUS: STUDENTS’ PRACTICAL SKILLS AND THE QUALITY OF BAR SOAP MADE FROM USED COOKING OIL WITH PAPAYA EXTRACT Aulia Nur Alfiannissa; Tri Wahyuni; Findiyani Ernawati Asih
UNESA Journal of Chemical Education Vol. 15 No. 2 (2026)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ujced.v15n2.p157-164

Abstract

Used cooking oil is one of the household wastes that can be utilized as a raw material for solid soap production while supporting environmental sustainability efforts. This study explored the implementation of Project-Based Learning (PjBL) integrated with edu-ecopreneurship through a project involving the production of solid soap from used cooking oil with the addition of papaya extract. The study involved 72 tenth-grade students from the Laboratory Testing Analysis (APL) program at a vocational high school in Gresik and employed a quantitative descriptive approach with a one-shot case study design. Data were collected through observations of students’ practical skills and quality testing of the soap products, including pH value, residual alkali content, density, and foam stability. The observations showed that students generally demonstrated good practical skills during project implementation, particularly in preparing materials, following procedures, and applying laboratory safety practices. The soap produced by both classes exhibited relatively similar characteristics, with satisfactory density and foam stability; however, the pH values and residual alkali content indicated that the saponification process had not yet reached optimal conditions. The project provided opportunities for students to apply chemistry concepts through direct experience while utilizing waste materials with potential economic value, making learning activities more relevant to real-life environmental issues.  
Co-Authors Aulia Nur Alfiannissa Findiyani Ernawati Asih